<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <SCRIPT LANGUAGE="JavaScript">
    var bb = 1;
    function aa(bb) {
      bb = 2;
      alert(bb);
    };
    aa(bb);
    alert(bb);
  </SCRIPT>
</head>
<body>

</body>
</html>
